ANHUI Gas Mask Filter NATO Specifications NBC for 40mm CBRN Filter NATO with Longest Shelf Life 20 Years

Carbon Monoxide Filter Cartridges, Transform your gas mask into a reliable, fully-functioning, multi-use smoke hood with these filters. Designed to overcome smoke & particulates (along with high concentrations of carbon monoxide), these advanced filters can provide crucial hours of protection and clean air from some of the most common disasters faced by US citizens., Fits standard 40 mm gas mask, Made to NATO Specifications, 20 Year Shelf Life (Manufactured in 2020)